Take Hwy 99W south about 15 miles. Turn right on Alpine Road, follow for approximately 9 miles. Alpine Road turns into South Fork Road. Follow about 4 miles to the Alsea Falls Campground on the right.
Although Alsea Falls was a bit hard to find, it is definitely worth the struggle! This trail is a 3 mile out and back, moderately trafficked, and rated as easy. There are a few places with steep incline, but to the side there are usually natural stairs to help the process haha
Check out the That Hiking Girl Instagram page for a video showing different parts of the trail throughout the whole hike!